IIUC only at about 0.5c in copper wiring on a chip, due to reflections, which is about 5cm per clock cycle in a modern desktop or server CPU, which is on the order of a centimetre across. Quite tight a constraint! Also loss is lower I think, which would result in less heat, and bandwidth is higher.

_________________Say, can you feel the thunder in the air? Just like the moment ’fore it hits – then it’s everywhereWhat is this spell we’re under, do you care? The might to rise above it is now within your sphereMachinae Supremacy – Sid Icarus

without resistance, and with all the data that can fit in a channel, and the fact that it can travel with fiber, or through a vacuume, or through a medium like a gas, means routing can be dynamic, so connection A->B can change to A->C without a new motherboard

the idea is that the whole system can be modified, whenever, for whatever reason, so you could add pieces, remove them etc, or change the function of a device based on the task,

_________________Let not the bindings of society hold you back from improving it.... the masses follow where the bold explore.